Electric motor



2 SheetsSheet 2.

w M %M Hm Ym (-No Model.)

No. 402,290. Patented Apr. 30, 1889.

AINI/EIVTOR, v. vUJx/mv WITNESSES.

A TTORNEYJ N. PETERS, PmwLm rwMr, Wuhinglm D. Cv

UNITED STATES PATENT OFFICE.

FREDERKK YEISER, OF TAMPA, FLORIDA.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 402,290, dated April 30, 1889.

Application filed May 7,1888. Serial No. 273,015. (No model.)

To aZZ whom it may concern:

Be it known that I, FREDERICK YmsER, of Tampa, in the county of llillsborough and State of Florida, have invented a new and Improved Electric Motor, of which the following is a specification, reference being had to the annexed drawings, forming a part thereof, in which Figure 1 is a side elevation of my improved motor. Fig. 2 is a plan view. Fig. 3 is an end elevation, and Fig. 4 isa perspective view of the armature and circuit-operating cams.

Similar letters and figures of reference indicate corresponding parts in all. the views.

The object of my invention is to construct a simple electric motor in which the power will be developed by the oblique approach of the armature to the center of the helix.

My invention consists in a series of coils, a shaft journalcd eccentrically in the coils, a series of armatures arranged around a cylinder at equidistant points, a corresponding series of circuit-operating cams carried by the said shaft, and circuit making and breaking levers adapted to be operated by the cams, all as hereinafter more fully described.

To the base A is secured a support, B, to which are secured in the present case four helices, 1 2 3 i, which are axially in line with each other. In the said helices, parallel with their common axis, but eccentrically with reference to their peripheries, is journaled a shaft, G, which carries a drum, D, upon which are secured in the present case four soft-iron armatures, 5 6 7 8, at equally distant points around the circumference of the drum-one armature being located. in each. of the coils.

At the sides of these armatures 5 (l 7 S are secured four cams, i) 10 11 The said cams each have an elevated surface, which extends about half-way round its periphery, with a square shoulder, a, opposite the center of the adjacent armature.

Upon a rod, E, are pivoted levers 13 ll 15 16, which extend into the spaces between the coils 1 f2 3 l, and are engaged by the cams 9 1O 11 12. Upon the rod 1* between the said levers, are placed. checks Z2, which separate the levers, and to the said checks are secured springs c, which tend to keep the levers in engagement with the cams.

Bet-ween the si'ai'ulards l? is arranged a copper-faced bar, 1, which is supported in posi tion to be struck by the outer ends of the levers let 1.5 16, as the said. levers are moved by the cams 9 1011 12. The bar G is sup ported by spiral springs (I, so that it may yield as it is pressed downwardly by the said levers. Each lever 1-3 1: c l5 16 is provided with a copper cap, c, for forming an electrical contact with the bar G. To the base A is attached a copper strip, H, which is connected electrically with the binding-posts l J by the wires f g, and the bar G is connected with the binding-posts I J by the wires f g. One terminal of each coil 1 2 3 a is also connectcd with the said strip H, the remaining terminal being connected with the cap c of one of the levers.

The binding-posts I I are designed to receive wires from a dynamo, and the bindingposts J J are designed to receive wires from a battery. The motor in the present case is provided with a counter-shaft, K, having a pulley, L, which receives motion through a belt, 71, from a wheel, M, on the armature shaft 0. hen acurrent is sent from the dynamo or battery, or from both jointly, the current passes through one of the coils 1'2 3 4, when its armature starts on its approach toward the center of the coil, the circuit of the lever belonging to that coil maintaining a contact between the bar G- and its copper cap c until the armature reaches the center of the coil, when the inner end of the lever jumps off from the cam and allows the spring 0 to open the lever, so as to open the circuit. By this arrangement one coil after another is brought into the circuit and one armature after another is drawn toward the center of its coil and released, thus producing a con tinuous rotary motion in the shaft 0.

llavin g thus described my invention, I claim as new and desire to secure by Letters Pat ent- 1. An electric motor comprising a series of coils, a shaft journaled eccentrically in the coils, a series of armatures arranged around the shaft at equidistant points, a correspond ing series of cams carried by the said shaft, and circuit making and breaking levers adapted to be operated by the arm, substan tially described.

2. In an electric motor, the combination,

with a series of coils, 1 2 3 4, of the armaturevided with conducting-caps, of a spring-supshaft 0, carrying armatures 5 6 7 8, the cams ported conducting-bar arranged to be touched 1o 9 10 11 12, the circuit-operating levers 13 14 by all of the levers, substantially as specified 15 16 the sprin -supported bar G and the 5 electrical connections, substantially as speci- FREDERICK YEISER' fied. Witnesses: 3. In an electric motor, the combination, WM. H. BECKWITH,

with aseries of circuit-operating levers pro- W. 0. BROWN. 

